A spectrally regulated light guide illumination system

Abstract

The application discloses a kind of light guide illumination systems of spectroscopic regulation, it includes light guide system and energy production system;The energy production system includes transparent bearing container, pump, nanofluid, heat exchanger and heat storage water tank;The shell side of heat exchanger and transparent bearing container are connected by pipeline and form circulation, transparent bearing container and pipeline are filled with nanofluid, pump is arranged on pipeline, heat exchanger is formed circulation with heat storage water tank by pipeline, pump is arranged on pipeline, light guide system is arranged on wall, light path entrance of light guide system is placed outdoors, light path exit of light guide system is located indoors, transparent bearing container is located at the light path exit of light guide system.Nanofluid with unique optical properties is integrated in light guide system in the application, passive energy-saving technology is converted into active energy production technology, and building load and lighting energy consumption can be effectively reduced.

Description

Technical Field

[0001] This invention relates to building energy-saving technology, specifically to a light-guiding lighting system with spectral modulation. Background Technology

[0002] Lighting is essential for any building, but the electric lighting commonly used in various buildings consumes a lot of electricity, especially in underground spaces. Light pipes can serve as an alternative to electric lighting, providing efficient natural light without consuming electricity. However, light pipes lack spectral selectivity, which may negatively impact thermal comfort while ensuring the building's light comfort.

[0003] like Figure 1 As shown, solar spectral energy is mainly concentrated in the 300-2500nm range, with visible light in the 380-780nm band accounting for only 43% of the total energy, while infrared radiation, despite not having a lighting function, accounts for 52%. In summer, the infrared energy introduced by the light pipe increases the building's cooling load. Therefore, to maximize the energy-saving effect of the light pipe, it is necessary to isolate the infrared band from the outside while ensuring the transmittance of the visible light band. However, existing infrared blocking technologies mainly rely on surface coatings to reflect infrared radiation, thereby reducing infrared radiation entering the room. While this method can reduce the cooling load in summer, it will have a negative impact on the building's winter heating, and cannot be flexibly adjusted according to changes in the external environment and the building's dynamic energy demand; furthermore, surface coating technology can only reflect radiant energy and cannot further utilize this energy to realize building energy production. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a spectrally modulated light-guiding lighting system. A transparent support container, nanofluid, water pump, heat exchanger, and hot water storage tank are combined to form a power generation system or a nanofluid circulation system. The transparent support container is installed at the light path outlet of the light-guiding system, enabling the filtering of the solar spectrum and the absorption and utilization of infrared radiation energy. By changing the nanofluid concentration, the system's photothermal energy output is adjusted to meet the dynamic energy needs of different buildings in different seasons / time periods.

[0005] A spectrum-controlled light-guiding illumination system includes a light-guiding system and a power generation system; the power generation system includes a transparent support container, a pump, a nanofluid, a heat exchanger, and a hot water storage tank.

[0006] The shell side of the heat exchanger and the transparent support container are connected by a pipe to form a circulation. The transparent support container and the pipe are filled with nanofluid. A pump is installed on the pipe. The heat exchanger is connected to the hot water storage tank through a pipe. A pump is installed on the pipe. The light guiding system is installed on the wall. The light path entrance of the light guiding system is located outdoors, and the light path exit of the light guiding system is located indoors. The transparent support container is located at the light path exit of the light guiding system.

[0007] Furthermore, the light guiding system includes a light collecting cover, a light guide tube, and a diffuser; the light guide tube is installed on the wall, with its two ends respectively located outdoors and indoors, the light collecting cover is installed at the outdoor port of the light guide tube, the diffuser is installed at the indoor port of the light guide tube, and a transparent carrier container is positioned on top of the diffuser.

[0008] Furthermore, the transparent container is made of ultra-white glass.

[0009] Furthermore, the nanofluid is mainly a mixture of nanoparticles, deionized water, and a dispersant.

[0010] Furthermore, the nanoparticles are antimony tin oxide particles.

[0011] Furthermore, the light guide tube is a circular tube with a layer of silver mirror coated on its inner wall.

[0012] Furthermore, the light-collecting cover has a hemispherical structure.

[0013] The advantages of this invention compared to the prior art are:

[0014] Compared to traditional lighting equipment, this invention has two main advantages:

[0015] 1. This invention combines nanofluids with a light guide system, which can provide a more efficient cold light source, reduce indoor heat gain, and further utilize absorbed infrared energy to realize building productivity.

[0016] 2. The presence and concentration of the nanofluid in this invention can be adjusted to adapt to the building's energy needs and changes in the outdoor environment. For example, the nanofluid can be removed in winter to use solar radiation to improve the indoor thermal environment, or the concentration of the nanofluid can be reduced on cloudy days to increase light energy output to meet the building's needs.

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments: Attached Figure Description

[0018] Figure 1 It is a map of solar spectral energy distribution;

[0019] Figure 2 This is a schematic diagram of the light guide illumination system of the present invention;

[0020] Figure 3 This is a schematic diagram of the optical guide system of the present invention;

[0021] Figure 4 This is a schematic diagram of the production capacity system of the present invention;

[0022] Figure 5 This is a schematic diagram of the principle of nanofluid filtering infrared light. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art.

[0024] Combination Figure 2 The light-guiding illumination system with spectral modulation includes a light-guiding system A and a power generation system B; the power generation system B includes a transparent support container 4, a pump 5, a nanofluid 6, a heat exchanger 7, and a hot water storage tank 8.

[0025] The shell side of heat exchanger 7 and transparent support container 4 are connected by pipe 1 to form a circulation. The transparent support container 4 and pipe 1 are filled with nanofluid 6. A pump 5 is installed on pipe 1. Heat exchanger 7 is connected to hot water storage tank 8 through pipe 2 to form a circulation. A pump 5 is installed on pipe 2. Light guiding system A is installed on the wall. The light path entrance of light guiding system A is located outdoors, and the light path exit of light guiding system A is located indoors. Transparent support container 4 is located at the light path exit of light guiding system A.

[0026] Utilizing the unique optical properties of nanofluids, which absorb and utilize infrared radiation from the solar spectrum, the nanofluid flows through pipe 1, transparent support container 4, and heat exchanger 7. During this process, the nanofluid filters the infrared spectrum, increasing its temperature while reducing heat gain within the room. Driven by pump 5, the high-temperature nanofluid heats the hot water through the heat exchanger, lowering its temperature before flowing back into the support container. The resulting hot water is stored in a hot water storage tank 8 and can be used for heating or domestic hot water supply.

[0027] The energy production system B, consisting of the transparent support container 4, nanofluid 6, pump 5, heat exchanger 7, and hot water storage tank 8, is also a nanofluid circulation system responsible for solar spectrum filtration and infrared energy absorption or utilization. The transparent support container 4 is installed at the light path exit of the light guiding system A to achieve solar spectrum filtration and the absorption and utilization of infrared radiation energy. By changing the nanofluid concentration, the system's light / heat energy output is adjusted to meet the dynamic energy needs of different buildings in different seasons and at different times.

[0028] Example 1: The light guiding system A includes a light-collecting cover 1, a light guide tube 2, and a diffuser 3. The light guide tube 2 is mounted on a wall, with its two ends positioned outdoors and indoors, respectively. The light-collecting cover 1 is located at the outdoor end of the light guide tube 2, and the diffuser 3 is located at the indoor end of the light guide tube 2. A transparent carrier container 4 is positioned above the diffuser 3. The light guiding system provides illumination. This example utilizes reflection to transmit outdoor light into the room.

[0029] More than half of the solar spectrum's energy is invisible light, which cannot provide illumination and increases indoor heat gain, affecting indoor thermal comfort. Nanoparticles in nanofluids have high absorption characteristics for invisible light energy, primarily in the infrared band, while exhibiting high transmittance for visible light. By combining nanofluids with unique optical properties with a light-guiding system, sunlight is collected by a light-collecting hood 1, reflected and conducted into the room within a light guide tube 2, and filtered into a highly efficient cold light source by nanofluid 6 in a transparent carrier container 4. It is then evenly diffused into the room through a diffuser 3, achieving illumination and reducing indoor heat gain. The nanofluid, having absorbed infrared energy, heats up and flows to a heat exchanger 7 driven by a pump 5, heating domestic hot water and providing heating.

[0030] Example 2: The transparent carrier container 4 is made of ultra-clear glass. The transparent carrier container 4, composed of high-transmittance ultra-clear glass, is installed on top of the diffuser 3. Nanofluid 6 flows within the transparent carrier container 4.

[0031] The nanofluid 6 is mainly a mixture of nanoparticles, deionized water, and a dispersant. The nanoparticles in the nanofluid have a high absorption rate for infrared light and a low absorption rate for visible light, thus enabling the filtering of the solar spectrum.

[0032] Furthermore, the nanoparticles are antimony tin oxide (ATO) particles. To meet the requirements of photothermal decoupling, ATO nanoparticles with a particle size typically between 10-100 nm are selected. To reduce costs, deionized water is chosen as the base liquid. In addition, to delay the aggregation and sedimentation of the nanofluids and improve fluid stability, a certain amount of dispersant (surfactant) is added to the system.

[0033] Heat exchanger 7 is responsible for exchanging heat between the nanofluid and tap water. Since nanofluid is relatively expensive (compared to tap water) and does not meet the safety requirements for domestic water, a closed system is selected. The heat exchanger is used to achieve heat exchange between the nanofluid and tap water, and then the high-temperature tap water is used for domestic water or heating.

[0034] The hot water storage tank 8 is responsible for storing hot water. It has good heat preservation performance and can store hot water during the day for use at night. The rest is the same as in Example 1.

[0035] Example 3: The light guide tube 2 is a circular tube with a layer of silver mirror coated on the inner wall.

[0036] The light-collecting cover 1 has a hemispherical structure.

[0037] Both the light-collecting cover 1 and the diffuser 3 are made of transparent plastic or glass. The light-collecting cover 1 has a hemispherical structure, which can efficiently guide sunlight into the light guide tube and block outdoor rain, snow / dust from entering the room. The diffuser 3 is a flat surface with a special texture, which allows it to guide incident light to be distributed more evenly into the room. The light guide tube 2 is a circular tube made of a high-reflectivity material. Outdoor light will be continuously reflected and transmitted to the diffuser inside the tube. The light guide tube 2 can be a circular tube made of aluminum with a silver mirror coating on the inner wall, which has extremely high reflectivity. The transparent carrier container 4 is made of high-transmittance ultra-white glass and is installed on the upper part of the diffuser 3. The rest is different from Embodiment 1 or 2.

[0038] Example 4: The diffuser 3 is made of a transparent material with Lamborghian diffusion properties, which can evenly disperse light throughout the room. It can efficiently guide sunlight into the light guide tube 2 and block rain, snow, or dust from entering the room.

[0039] Optionally, both the light-collecting mask 1 and the diffuser 3 are made of polycarbonate. The rest is the same as in any of Embodiments 1, 2, or 3.

[0040] The above-described embodiments or examples utilize the unique optical properties of nanoparticles to achieve spectral control and cascade utilization of the solar spectrum. While not affecting the lighting of the light guide system, they provide domestic hot water for the building and reduce the indoor cooling load (in summer), meeting the building's diverse energy needs and thus reducing building energy consumption in terms of both production capacity and energy saving.

[0041] This application integrates nanofluids with unique optical properties into a light guide system, transforming a passive energy-saving technology into an active energy-generating technology. This improves its energy flexibility and effectively reduces building load and lighting energy consumption, which is of great significance for environmental protection and energy conservation. The spectrum-controlled energy-generating light guide lighting system is adapted to my country's ecological civilization construction, achieving efficient matching between the solar spectrum and building energy demand, and has good economic benefits and broad application prospects.

[0042] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention, and all such modifications or alterations shall still fall within the scope of the present invention.

Claims

1. A light-guiding illumination system with spectral modulation, characterized in that: It includes a light guiding system (A) and a power generation system (B); the power generation system (B) includes a transparent carrier container (4), a pump (5), a nanofluid (6), a heat exchanger (7), and a hot water storage tank (8); The shell side of the heat exchanger (7) and the transparent support container (4) are connected by a pipe to form a circulation. The transparent support container (4) is made of ultra-white glass. The transparent support container (4) and the pipe are filled with nanofluid (6). A pump (5) is installed on the pipe. The heat exchanger (7) is connected to the hot water storage tank (8) through a second pipe. A pump (5) is installed on the second pipe. The light guiding system (A) is installed on the wall. The light guiding system (A) includes a light collecting cover (1), a light guide tube (2), and a diffuser (3). The light guide tube (2) is installed on the wall. The light path inlet and outlet of the light guide tube (2) are arranged outdoors and indoors, respectively. The light collecting cover (1) is installed outdoors of the light guide tube (2). At the port, the diffuser (3) is set at the port of the interior of the light guide tube (2), and the transparent carrier container (4) is arranged on the upper part of the diffuser (3). The nanofluid (6) is a mixture of nanoparticles, deionized water and dispersant. The nanoparticles are antimony tin oxide particles. The light collecting cover (1) is a hemispherical structure. Visible light is collected by the light collecting cover (1), and is conducted to the interior through reflection in the light guide tube (2). It is filtered into a high-efficiency cold light source by the nanofluid (6) in the transparent carrier container (4), and then evenly diffused into the interior through the diffuser (3). The temperature of the nanofluid that has absorbed infrared energy rises. The nanofluid flows to the heat exchanger (7) under the drive of the pump (5).

2. The light guide illumination system with spectral modulation according to claim 1, characterized in that: The light guide tube (2) is a round tube with a layer of silver mirror coated on the inner wall.

3. The light guide illumination system with spectral modulation according to claim 1, characterized in that: The light-collecting cover (1) is made of transparent plastic or glass.

4. The light guide illumination system with spectral modulation according to claim 3, characterized in that: Both the light-collecting mask (1) and the diffuser (3) are made of polycarbonate.

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